figure;
y3 = y1 + rand(1, 100) - 0.5;
plot(x, y1, 'LineWidth', 2, 'Color', [0.21, 0.21, 0.67]);
hold on
% 设置数据点的形状、数据点的填充颜色、数据点的轮廓颜色
plot(x, y3, 'o', 'LineWidth', 2, 'Color', [0.46, 0.63, 0.90], 'MarkerFaceColor', [0.35, 0.90, 0.89], 'MarkerEdgeColor', [0.18, 0.62, 0.17]);
hold off
